Transformer earthing types and transformer neutral earthing conductor size

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Transformer earthing types include solid earthing, resistance earthing, and reactance earthing. The size of the transformer neutral earthing conductor depends on the transformer rating.

Solid earthing involves connecting the transformer neutral directly to the earth
Resistance earthing involves connecting a resistor between the transformer neutral and earth
Reactance earthing involves connecting a reactor between the transformer neutral and earth
The size of the transformer neutral earthing conductor is determined by the transformer rating and the fault current level
For example, a 500 kVA transformer with a fault current level of 10 kA may require a neutral earthing conductor of 50 mm²

Transformer earthing types and transformer neutral earthing conductor size

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